Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-field
Abstract Orbital angular momentum (OAM) mode combining and canceling in the near-field was investigated using a Cassegrain dual-reflectarray antenna composed of multiple microstrip patches on the main and sub-reflectarrays. Microstrip patches on dielectric substrates were designed to radiate the par...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2017-10-01
|
| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-017-13125-5 |
| _version_ | 1818993821709500416 |
|---|---|
| author | Woo Jin Byun Hyung Do Choi Yong Heui Cho |
| author_facet | Woo Jin Byun Hyung Do Choi Yong Heui Cho |
| author_sort | Woo Jin Byun |
| collection | DOAJ |
| description | Abstract Orbital angular momentum (OAM) mode combining and canceling in the near-field was investigated using a Cassegrain dual-reflectarray antenna composed of multiple microstrip patches on the main and sub-reflectarrays. Microstrip patches on dielectric substrates were designed to radiate the particular OAM modes for arithmetic mode combining, where two OAM wave-generating reflectarrays are very closely placed in the near-field. We conducted near-field antenna measurements at 18 [GHz] by manually replacing the sub-reflectarray substrates with different OAM mode numbers of 0, ±1, when the OAM mode number of the main reflectarray was fixed to +1. We subsequently checked the azimuthal phase distributions of the reflected total electromagnetic waves in the near-field, and verified that the OAM waves mutually reflected from the main and sub-reflectarrays are added or subtracted to each other according to their OAM mode numbers. Based on our proposal, an OAM mode-canceling reflectarray antenna was designed, and the following measurements indicate that the antenna has a better reflection bandwidth and antenna gain than a conventional reflectarray antenna. The concept of OAM mode canceling in the near-field can contribute widely to a new type of low-profile, broad-reflection bandwidth, and high-gain antenna. |
| first_indexed | 2024-12-20T20:48:09Z |
| format | Article |
| id | doaj.art-513dda5a3f0649c597c96cbd36ddf544 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-12-20T20:48:09Z |
| publishDate | 2017-10-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-513dda5a3f0649c597c96cbd36ddf5442022-12-21T19:26:59ZengNature PortfolioScientific Reports2045-23222017-10-01711910.1038/s41598-017-13125-5Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-fieldWoo Jin Byun0Hyung Do Choi1Yong Heui Cho2Radio Resource Research Group, Electronics and Telecommunications Research Institute (ETRI)Radio Environment & Monitoring Research Group, Electronics and Telecommunications Research Institute (ETRI)School of Information and Communication Engineering, Mokwon UniversityAbstract Orbital angular momentum (OAM) mode combining and canceling in the near-field was investigated using a Cassegrain dual-reflectarray antenna composed of multiple microstrip patches on the main and sub-reflectarrays. Microstrip patches on dielectric substrates were designed to radiate the particular OAM modes for arithmetic mode combining, where two OAM wave-generating reflectarrays are very closely placed in the near-field. We conducted near-field antenna measurements at 18 [GHz] by manually replacing the sub-reflectarray substrates with different OAM mode numbers of 0, ±1, when the OAM mode number of the main reflectarray was fixed to +1. We subsequently checked the azimuthal phase distributions of the reflected total electromagnetic waves in the near-field, and verified that the OAM waves mutually reflected from the main and sub-reflectarrays are added or subtracted to each other according to their OAM mode numbers. Based on our proposal, an OAM mode-canceling reflectarray antenna was designed, and the following measurements indicate that the antenna has a better reflection bandwidth and antenna gain than a conventional reflectarray antenna. The concept of OAM mode canceling in the near-field can contribute widely to a new type of low-profile, broad-reflection bandwidth, and high-gain antenna.https://doi.org/10.1038/s41598-017-13125-5 |
| spellingShingle | Woo Jin Byun Hyung Do Choi Yong Heui Cho Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-field Scientific Reports |
| title | Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-field |
| title_full | Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-field |
| title_fullStr | Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-field |
| title_full_unstemmed | Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-field |
| title_short | Orbital Angular Momentum (OAM) Antennas via Mode Combining and Canceling in Near-field |
| title_sort | orbital angular momentum oam antennas via mode combining and canceling in near field |
| url | https://doi.org/10.1038/s41598-017-13125-5 |
| work_keys_str_mv | AT woojinbyun orbitalangularmomentumoamantennasviamodecombiningandcancelinginnearfield AT hyungdochoi orbitalangularmomentumoamantennasviamodecombiningandcancelinginnearfield AT yongheuicho orbitalangularmomentumoamantennasviamodecombiningandcancelinginnearfield |